I just got my 2014 FFH SE last week and my question is...When do I stop for gas? From what I have read in the posts, it seems like people wait until the car tells you it's low, but does it impact your MPG to fill up when there is 1/4 tank left, or half a tank left? My dad always said to "never let your gas tank go below a quarter of a tank!" Is it the same with the hybrids?